// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef UI_GFX_SYS_COLOR_CHANGE_LISTENER_H_
#define UI_GFX_SYS_COLOR_CHANGE_LISTENER_H_

#include "base/macros.h"
#include "ui/gfx/gfx_export.h"

namespace gfx {

// Interface for classes that want to listen to system color changes.
class GFX_EXPORT SysColorChangeListener {
public:
    virtual void OnSysColorChange() = 0;

protected:
    virtual ~SysColorChangeListener() { }
};

// Create an instance of this class in any object that wants to listen
// for system color changes.
class GFX_EXPORT ScopedSysColorChangeListener {
public:
    explicit ScopedSysColorChangeListener(SysColorChangeListener* listener);
    ~ScopedSysColorChangeListener();

private:
    SysColorChangeListener* listener_;

    DISALLOW_COPY_AND_ASSIGN(ScopedSysColorChangeListener);
};

} // namespace gfx;

#endif // UI_GFX_SYS_COLOR_CHANGE_LISTENER_H_
